Improvement in the manufacture of paper-pulp



NITED/A STATES PATENT OFFICE.

LUGIEN BARDOUX, OF POITIERS, FRANCE.

Specification forming part of Letters Patent No. 42,155, dated April 5, 1864.

To all whom it may concern:

Be it known that I, LUOIEN BARDOUX, of Ioitiers, in France, have invented a new and useful process of making pulp for the manufacture of paper and pasteboard from a variety of substances, vegetable as well as animal, and that I have already obtained Letters Patent on the said process in France under date of June 7, 1861, April 19, 1862, and November 10, 1862, in October, 1863; the invention as patented in Belgium the 22d April, 1863, in Holland the 12th May, 1863, in Prussia the 9th May, 1863, and in England the 9th May, 1863; and I do hereby declare that the following is a full and exact description of my said invention.

The nature of my invention consists in a process of making pulp for the manufacture of paper and pasteboard from a variety of vegetable as well as animal substances.

To enable others skilled in the art to make and use my invention, I will proceed to describe it.

The substance which is to be made into pulp is first cut up into small pieces and boiled for one or two hours. Then it is pounded while water is being added until reduced to ahomogenous mass. The mass is then placed on a sieve and worked about until the gummous particles it may contain have passed through the sieve. The fibrous mass will then form theresidue remaining on the sieve. This mass is then again exposed to the pounding operation, water being added, and while this process goes on chlorcalcium (chlorure du charm) well pulverized is gradually added about one-half the weight of the mass. The mass is then gradually washed clean and the water drawn off. This process of adding chlorcalcium (chlorure du chaux) and working the mass may be repeated two or three times, according to circumstances, the pounding operation being continued all the time; but while adding the chlorcalcium (chlorure du charm) care must be taken that the color of the mass does not become too white, because then the mass would be burned and unfit for the manufacture of paper. Sulphuric acid (acids sulfum'que) diluted in five parts of water is then added, one-fifth of the weight of the mass to neutralize the remaining particles of chlorcalcium, (chlorure do charm) and after this has been effected the water is drawn off. The mass is then pressed until nearly dry. It is then broken up into small pieces. Ohlorkalium (chlorure dupotasse) is sprinkled over it and ground up with it until the discolorin g process has been completed. Finally, the mass is washed four or five times, and then the pulp is ready to be made into paper or pasteboard A chemist by profession, I have experimented for many years upon all sorts of substances I considered fit to be made into pulp suitable for the manufacture of paper and pasteboard. The result of these experiments and of many years of labor is the above-described process, which for cheapness, effectiveness, and adaptability to the great number of substances below mentioned is all that can be desired, and it furnishes the means to make cheap and good papers and pasteboards from substances that can be had very cheap, and great quantities of which have altogether gone to waste heretofore.

By the application of the above process I have produced good papers and pasteboards from the peels of or the whole of apples, potatoes, peas, beans, turnips, cherries, grapes, grape-vines, garlic, cabbage, artichokes, asparagus, chives, lilies, bran, broom grass,

thistles, ferns, reeds, willow-boughs also from the leaves of oak, poplar, maple, and elm, and I of remnants of all sorts of animal-hides. Besides, I have applied my process to straw, cornstalks, and leaves, hay, hemp, old cordage, linen and cotton rags, and oak, chestnut, walnut, ash, elm, beach, fir, and poplar wood with equal success.

I have produced paper of admirable quality of garlic, an excellent parchment-pasteboard of apples, a beautifulwhite pasteboard of oakleaves, and first-rate paper of willow-boughs.

I enter, together with this application for Letters Patent, several specimens of the papers produced by my above-described process.

Specimens Nos. 1 and 2 are made of the apple pulp or residuum left in the manufacture of cider. This paper is adapted for cigarettewrappers. Specimen No. Gisimitation parchment, and is made of the same apple-pulp bleached in the manner described in the specification. Specimen No. 33 is made of pulp of macerated hide treated with chlorcalcium and sulphuric acid, as herein described, with tho addition of small proportion of yell: of eggs. for the manufacture 0t paper and pasteboard, This paper is intended to be used as cover in adapted to vegetable as well as animal subbinding books. stances. 7

Having described my invention, what I LUOIEN BARDOUX. claim as new, and desire to secure by Letters Witnesses: Patent of the United States, is- E. BARDOUX, V

The above-described process of makingpulp HENRY WARAL. 

